View Solution

Child of Poseidon

Complete all underwater location objectives.

Child of Poseidon-0.2
2 guidesOffline Game Mode - These achievements require play in game modes that do not necessitate a connection to any online services.Single Player - These achievements can be obtained by a single player.Collectable - These achievements are obtained by exploring the game environment to find a set of unique objects.
13 Oct 2018 13 Oct 2018
277 12 55
There are 42 underwater locations, Powerpyx has a great guide with maps at

Visiting the small island under Chios unlocks a waterbreathing engraving which will help a lot
Thanks Im Vendy
Im VendyGetting the underwater breathing engraving/ which you unlock by visiting the small island underneath Chios (Far right side) will help a lot! (I believe it is even required for a few of them)
Posted by Im Vendy on 13 Oct 18 at 13:54
Zeifer95I had no idea this even existed, managed all of them without it though, some are a pain to find so it would help anyway!
Posted by Zeifer95 on 13 Oct 18 at 17:12
Fuzzmeister JThe one near Keos needs a key. You get it from a quest on Keos that pops up later int he story.
Posted by Fuzzmeister J on 14 Oct 18 at 22:54
wolfzero01does anyone know where to get the key for the chest at the Ruins of Arne site, located in the Boeotia region?
Posted by wolfzero01 on 16 Oct 18 at 18:17
Zeifer95I swam into one locked chest but it didn't count towards the location objectives, I don't think locked chests do
Posted by Zeifer95 on 16 Oct 18 at 19:12
wolfzero01ok, it took a couple of seconds, but the chest finally showed up, so the locked one I found isn't part of the Ruins of Arne site
Posted by wolfzero01 on 16 Oct 18 at 23:03
AdvisingMonkey2Location 7 "Ruins of Arne " Key is located on a nearby skeleton not far from the chest.

Location 21 "Submerged Minoan Palace" Key is obtained by completing the side quest "We’re Not Thieves" located at the top left side of Keos.
Posted by AdvisingMonkey2 on 19 Oct 18 at 10:20
LimesquashI used this map to get all 42 but the achievement didn’t pop? Does anyone know if there is a main story quest that is required for this too? I’m in chapter 6.
Posted by Limesquash on 20 Oct 18 at 09:19
Seeker74You might want to add that Poseidon's Trident is level 41 and the lions around it are as well. The best way to get it at a lower level is by finding the big gold chest and sneaking up on it from the back so that the lions don't see you.
Posted by Seeker74 on 22 Oct 18 at 16:56
Apostle92627I used the map to find the last three I needed for the achievement. I also got the Trident at level 39. Thank you! I voted positive.
Posted by Apostle92627 on 25 Oct 18 at 03:23
fenderbender234I can confirm that I followed this map as well to the T. I double checked that I completed all 42 locations (all chests as well as the few that have additional engraving unlocks and such) and the achievement has not popped. Anyone else notice a sort of bug? I tried restarting the game to no avail.

Edit: I thought I would add that I have completed all of the main storyline, as well as all other achievements for this game (excluding the most recent one ‘lightning rod’ as the boss isn’t in the game yet) so there shouldn’t be anything barring me from completing this achievement.

Edit 2: I think it’s worth noting that the guide the OP linked, says that there are 2 objectives for the submerged Minoan palace, while mine says that it’s complete at 1/1 objective. I have done the questline that takes you there with the key to grab the treasure from the locked chest
Posted by fenderbender234 on 03 Nov 18 at 00:31
Xx DIKAU xXYeah me too. I saw at the ubi forums that much people have the same problem exactly on these by the Minoan Palace.
Posted by Xx DIKAU xX on 03 Nov 18 at 11:11
Sigma 3815I think the key to unlocking the achievement is the game telling you the location is complete followed by the experience gain. I completed all the locations in my first play through, already getting the chest not associated with the quest in the Minoan palace before the update, even though the location was technically completed. The achievement never popped. In my second play through, I got the experience for completing the Minoan palace (only opening its single necessary chest post-update) and all the other locations and unlocked the achievement. Hope this helps.
Posted by Sigma 3815 on 04 Nov 18 at 01:47
Rafael D ArroyoIt glitched for me too, god dammit, did everything, every location checked, and no achievement. Started playing just two weeks ago
Posted by Rafael D Arroyo on 04 Nov 18 at 20:14
MAJORPOOPYGlitched for me as well. Went through one by one and triple checked. All complete, no cheevo.

Last one I needed to get too. I hate that.
Posted by MAJORPOOPY on 05 Nov 18 at 05:08
MAJORPOOPYApparently it was the Minoan palace that broke the achievement. Between 1.05 and 1.06 they reduced the chests to 1. But I'm sure the achievement didn't get updated to reflect that. If you collected both before the 1.06 patch you're probably fine. If, like me, just collected it after patch, there's only one to collect. I'm sure the achievement had some sort of hidden counter that is now one short thanks to the patch.
Posted by MAJORPOOPY on 05 Nov 18 at 06:37
xxx iFIGHT xxxWell I just went back to the palace and it says 1/1 but no cheevo.
Posted by xxx iFIGHT xxx on 07 Nov 18 at 03:44
xTyDiRiUmxSame here, mine says 1/1 when I see in the guide it shows 2/2. I know the locations itself has one chest when I first did it, then saw a second chest that I tried to open but required a key. I then later came back in my playthrough and unlocked it once I obtained the key but it still shows 1/1 and no Cheevo. So lame to work so hard for every other achievement to get glitched on the last one
Posted by xTyDiRiUmx on 08 Nov 18 at 01:17
LordSamoni1Definitely broken. Sadly I saw this before I just went through the list twice. I'll wait for a fix as I'm not starting a new playthrough.
Posted by LordSamoni1 on 08 Nov 18 at 17:21
xxx iFIGHT xxxSo did they put out an update yet??
Posted by xxx iFIGHT xxx on 08 Nov 18 at 23:25
Xx DIKAU xXIn the Ubiforums they already have investigations on it!
Posted by Xx DIKAU xX on 09 Nov 18 at 13:28
MassiveAssault5Looks like I too am in the same boat. Hopefully Ubi can retroactively fix it
Posted by MassiveAssault5 on 09 Nov 18 at 18:46
Tyron3L1oeasily the worst and most tedious task in the game
Posted by Tyron3L1o on 09 Nov 18 at 20:59
xxx iFIGHT xxxThis is the only cheevo I need to complete the game. Mark my words, this will be the last assassins creed game I buy.
Posted by xxx iFIGHT xxx on 09 Nov 18 at 23:47
jrod39There's hope yet--I just unlocked the achievement despite having 1/1 for the Minoan palace. I was actually quite surprised that it unlocked--I was working my way through PowerPyx's excellent guide and it unlocked on no. 32. I guess I had already done 33-42 through gameplay, Either way, achievement unlocked minutes ago.
Posted by jrod39 on 10 Nov 18 at 20:03
Raistlin 156Just an FYI: There are at least a dozen posts about it not unlocking on their forums. They've acknowledged a few of them. They have not said if they plan on fixing it though. It too is the only achievement I need in this game. It did not get fixed when they released the Cyclops update (in case you were wondering), so hopefully it will happen in the next bug release for those of us it affected...
Posted by Raistlin 156 on 14 Nov 18 at 21:10
MassiveAssault5That is correct Raistlin. I went through their next patch notes (1.07) and I see no fix there either. The best we can hope for is that 1.08 will address the issue. Perhaps the glitch was brought out too late during the assembly of 1.07. I feel confident that they’ll get to it eventually though. I remember Origins having that Aya bug which was retroactively fixed in a patch.
Posted by MassiveAssault5 on 15 Nov 18 at 14:12
Did you already have 1/2 before the 1.06 update (which changed it to 1/1 in Minoan palace) or did you clear the location after the 1.06 update?

Looks like it is only the people that had 1/2 before the 1.06 patch that have the achievement broken.
Posted by S4W on 15 Nov 18 at 19:13
T0NY HAYABUSAI'll be completing this tonight. Not sure if I got the 2 chests before the update but I guess I will find out once I finish it tonight.
Posted by T0NY HAYABUSA on 16 Nov 18 at 11:30
FranconianXIs this only bugged for those who started collecting between the last patches?
So if you start the game now with 1.07, will it unlock?
Posted by FranconianX on 18 Nov 18 at 13:39
irritatieThis map is very useful. Now let’s wait until the bug is fixed to get my last achievement!
Posted by irritatie on 18 Nov 18 at 16:21

The bug only happened if you already had 1/2 before they dropped patch 1.06. The achievement will unlock just fine if you didn't already loot the location.
Posted by S4W on 19 Nov 18 at 05:37
KalujoWell that sucks. Used this guide to find I had all but no. 28 done. Got the chest & it didn't register. Went back to a save 20 minutes earlier, did it again & it counted. Now I find the 'chieve is broken because I had 1/2 on the Minoan Palace. This & losing 2 days of progress because my quests all disappeared has taken a lot of fun out of the game. Thank you for the great map though!
Posted by Kalujo on 21 Nov 18 at 12:34
Warboy925"You might want to add that Poseidon's Trident is level 41 and the lions around it are as well. The best way to get it at a lower level is by finding the big gold chest and sneaking up on it from the back so that the lions don't see you."

Heck, I got the Trident when I was only lvl 14, lol.....just got lucky avoiding all the other ships!
Posted by Warboy925 on 21 Nov 18 at 20:18
P1SSEDGREEKAll 42 locations complete and even went back to the Minoan palace to see if I had done both chests and I had, even though the location is marked 1/1. Last achievement I need. Seems to be another glitched because I had the same issue with the Hermes Homie achievement even though I had gone back through all the subregions.
Posted by P1SSEDGREEK on 25 Nov 18 at 23:30
ROBBERT DHTJust loaded up the game after the latest update and it got fixed :D
Posted by ROBBERT DHT on 29 Nov 18 at 13:04
xxx iFIGHT xxxHow exactly did it get fixed.
Posted by xxx iFIGHT xxx on 29 Nov 18 at 17:16
MassiveAssault5Title Update fixed the achievement! Excellent!
Posted by MassiveAssault5 on 29 Nov 18 at 19:08
Raistlin 156Update: Patch Notes for 1.1.0 have this, "The Child of Poseidon achievement/trophy will now unlock when conditions are met." They were right (of course), I simply turned on the game today, the achievement unlocked the moment I had control of my character.
Posted by Raistlin 156 on 29 Nov 18 at 23:48
The Lord PeanutJust knocked out the last 3 I was missing with this luck and no bleep bloop. :(

Any ideas?
Posted by The Lord Peanut on 11 Dec 18 at 11:40
irritatieWorks now. If the achievement still doesn’t pop, re-check your locations. I’m not a 100% sure, but with me it seemed that Pavlopetri was unchecked after the update. Either that or I accidentally missed this one after all.
Posted by irritatie on 16 Dec 18 at 09:07
tntiseverywereAfter patch 1.1.0 I had it popped right away without looting the Minoan palace quest chest.
Posted by tntiseverywere on 20 Dec 18 at 10:25
EscapeTheRoachIt's still 1 of 2 treasures and no achievement :(
Posted by EscapeTheRoach on 22 Dec 18 at 13:36
Bootybandit1No.10 Underwear Cavern was unticked for me. Went back and it completed but no achievement.
Posted by Bootybandit1 on 16 Jan 19 at 12:12
LordSamoni1Unlocked on loading game today. I really didn't want to play through a new save. Thanks for the patch UBI.
Posted by LordSamoni1 on 16 Jan 19 at 17:59
AussieBigfootGreat series of maps/images, was only missing #28 "Dorion Underwater Cave", & thankfully no issues unlocking the achievement!
Posted by AussieBigfoot on 25 Jan 19 at 02:22
TheLightMasterI also had Pavlopetri uncheck for me. If you achievement doesn’t pop after the 42, check this site again.
Posted by TheLightMaster on 12 Feb 19 at 07:20
Gente BlancoMy last was the of Palace of Amphitrite. I had the entire map unfogged yet this one still wasnt present. Try here first if you think you got them all.
Posted by Gente Blanco on 19 Feb 19 at 03:55
Simsonman08Hasnt popped for me either. Checked I had 42 done... any suggestions?
Posted by Simsonman08 on 12 Apr 19 at 10:56
Simsonman08Hasnt popped for me either. Checked I had 42 done... any suggestions?
Posted by Simsonman08 on 12 Apr 19 at 11:10
Simsonman08Hasnt popped for me either. Checked I had 42 done... any suggestions?
Posted by Simsonman08 on 12 Apr 19 at 13:04
Lordfred23here's the list in a spreadsheet to have a visual what you have completed or not just create a copy of it
Posted by Lordfred23 on 15 Jun 19 at 11:41
JW DEUCEI was looking only in the sea. After checking this link I realized I was missing ruins in a land locked lake. The Underwater Ruins of Dyspontion in the Forgotten Swamps of Elis. As soon as I got it, the achievement popped. I hope this may help.
Posted by JW DEUCE on 05 Nov 19 at 01:56
imaidiot19Pavlopetri took me forever, since the second chest is not near the location at all.
Posted by imaidiot19 on 11 Apr at 18:34
Boris l3Thank you 🙏🏽 Very helpful
Posted by Boris l3 on 19 May at 02:12